Acetate is a plant-based plastic made from wood pulp, not petroleum. That difference is why it sits against skin without the nickel or plasticizers synthetic frames often carry, why it holds colour through its full thickness rather than just on the surface, and why it polishes to a depth other materials never reach. At the end of its life it can be chemically broken down and reconstituted, recovering up to 90% of the original material.

Every RES/REI frame is made in Treviso, in the Veneto region of northern Italy – an hour from Belluno, the historic heart of Italian eyewear. Most production stages happen inside RES/REI's own workshop; a handful of finishing steps run through long-term partner workshops in the same area, under direct oversight.

Yes – more than almost any independent eyewear house. Rather than choosing shades from a supplier's catalogue, RES/REI develops custom acetate directly with Mazzucchelli 1849, specifying colour, pattern, layering, and translucency before the sheet exists. Roughly 80% of the colours and patterns in the collection don't exist anywhere else.

A colour usually starts from something specific – a design need, a combination found in the archive, a material behaviour worth chasing – and is worked out physically, not just on screen. Because acetate is a volume rather than a surface, the same colour behaves differently at different thicknesses and layerings, so RES/REI develops each one through sampling with Mazzucchelli until the material does what the design requires.

It means one team controls the frame from raw material to finished object, rather than handing it down a chain of separate factories. For RES/REI, that's a workshop in Treviso plus a small circle of long-term partners nearby – the same relationship model it keeps with its material supplier. The point isn't owning every building; it's that no stage becomes someone else's problem to care about.

It means human judgement at every stage where judgement matters – not the absence of machines. RES/REI runs the same CNC and robotics as large industrial producers, at a scale where one person still oversees every frame. Handmade, here, is about who's responsible for the result, not which tools touched it.

Six to eight weeks, with material already in stock. Around twenty stages, some – like tumbling, at four days – slower than anyone expects. Much of the process is patience: acetate has to rest before it can be cut or bent, or it won't hold its shape over the years you'll own it.

It's among the more responsible plastics available for eyewear. It's derived from a renewable raw material rather than petroleum, contains no petroleum-based plasticizers, and can be chemically reconstituted at end of life rather than downcycled – recovering up to 90% of the original material. Longevity matters too: a frame built to last years is, by itself, the more sustainable object.